Definition - What does Magnetic Disk mean?
A magnetic disk is a storage device that uses a magnetization process to write, rewrite and access data. It is covered with a magnetic coating and stores data in the form of tracks, spots and sectors. Hard disks, zip disks and floppy disks are common examples of magnetic disks.
Techopedia explains Magnetic Disk
A magnetic disk primarily consists of a rotating magnetic surface and a mechanical arm that circulates over it. The mechanical arm is used to read from and write data to the disk. The data on a magnetic disk are read and written using a magnetization process. Typically, a magnetic disk is the primary storage disk in a computer. Data are organized on the disk in the form of tracks and sectors, where tracks are the circular divisions of the disk. Tracks are further divided into sectors that contain blocks of data. All read and write operations on the magnetic disk are performed on the sectors.